I used 2 identical IDE harddisks on hdc and hdd for a raid1.
Everything went well with the setup (with the help of manpages and the Raid-HOWTO). But when I run the system the computer hangs after about 10 minutes and needs a reset. This has led to substantial data loss.
I have a Athlon 800 System with S.u.S.E. 7.2 and Kernel 2.4.4 (the S.u.S.E. Version).